further analysis is necessary. 10-year-old kevin collins was last seen a block from here at a bus stop on oak street on the way home from basketball practice at saint agnes school in 1984. witnesses at the time say he was pushed into a car with two teenager with mohawks. police aren't saying why they are renewing the search but cadaver dogs indicated there were bones under the concrete floor of a garage here at the duplex on masonic. >> the concrete was moved and several bones were located. the san francisco medical examiner's office responded to evaluate the bones. at this time, under preliminary investigation it's determined the bones are animal not human remains. >> reporter: police said the man who lived in the house at the time matched the description of a man seen talking to kevin. that person has died. police say the people who live there now are not suspects. kevin's mother lives in concord. with these potential developments and false leads, she says she feels numb. she says she wants closure but doesn't want to find her little boy under those circumstances. coming up in the ne